I had a 89 Chevy Corsica that was doing the same thing. I replaced the ECM (Electronic Control Module) and it solved my problem. Your ECM controls your cooling fan by supplying a ground to the cooling fan relay. Something in your ECM has gone bad and it must be replaced. Good luck!
You may have a bad connection in the wiring between the fuse and the fan 2 relay or a poor or coroded connection between the fan 2 relay and the condensor fan motor. Check the grounds also and clean them up also.
bottom of radiator
The thermostat connects to the top radiator hose on a 1996 Toyota Corolla. The bottom radiator hose connects to the water pump.
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repair the leak
in the radiator, some in the engine and some in the reservoir
The thermostat in a 1996 Toyota Corolla DX is located in the top radiator hose. It is in the end that is closest to the engine.
To change coolant on a Toyota Corolla, place a bucket under the radiator. Open the radiator drain valve and remove the radiator cap. When all antifreeze drains out, close the drain valve. Then refill with fresh antifreeze and replace the radiator cap.
The thermostat is located on the cooling system on a 2003 Toyota Corolla. The thermostat can also be found by following the upper radiator hose.
Normally one entire bottle cat fill a radiator.
I can answer that if I know the year of your Corolla. They differ. Post it on my message board or email me at dhutchison@bak.rr.com and I will be able to help.
I front of the radiator, driver side. Underneath the horn.
i have an 97 corolla 1.6, and there is one infront of the radiator in the left low corner, its about 20*15 centimeters